Posted by gerry

I recently upgraded my shack to an ICOM IC7300, which in the EU specification includes the 4 meter / 70MHz band. I do not have a vertical for 4m, or space for one right now, but had read about others using a small matching unit to provide the necessary match using the Diamond V2000, or Watson W2000, as my version is badged.

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Posted by gerry

At the Mayo Amateur Radio Rally a couple of years ago, a NI ham, Tom Herbison, MI0IOU was selling an interesting kit for the Raspberry Pi. It combined an Analogue Devices Clock Generator (AD9850) and an RF power meter (AD8307) to give a programmable sweep generator & detector... commonly known as a Wobbulator. I bought one and had an enjoyable afternoon not long afterward building it. It was a relatively easy build, and I got some use out of it tuning some Band Pass Filters I had built for use on multi-station portable ops.




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Posted by gerry

I have been playing with Software Defined Radio for a number of years, but recently advances in high-speed sampling has put relatively high quality, extremely high frequency SDR within reach of everyone. A few years ago Eric Fry reverse-engineered the communications from a Digital TV USB Dongle to see that it transmitted raw samples.

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Posted by gerry

Now that the weather is improving, I decided to dust off the /P kit and ensure that all was working will in anticipation of getting some outdoor operation. I had bought a lightweight dual-band beam for this purpose so decided to put it on a pole and see how it performed.

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Posted by gerry

The hugely hackable Girltech Im-Me has been used for many interesting hacks. However the internal antenna leaves a lot to be desired, being basically a little piece of wire.

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Posted by gerry

The FT817 from Yaesu is still the most featured portable radio available. The Elecraft KX3 might have better HF performance, but for sheer spectrum coverage, it doesn't come close... unless you spend a few hundred more Euros for the 2W output 2m or 4m transverter. You will definitely have a world class radio, but it still won't do UHF, and would cost something between twice and three times what an FT817 would.

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Posted by gerry

I have had an ASUS N56VZ laptop for about 18 months, and rate it as one of the best laptops I have ever had. I was dual-booting Windows 8 and Ubuntu off the 750GB hard drive since I got the laptop until one day I basically destroyed the Ubuntu install while playing with Docker.io

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Posted by gerry

Proton Mail is a free, web-based encrypted mail service founded by CERN in 2013. It uses client-side encryption, and could be termed a "trust no-one" mail service, since the data stored on the servers is encrypted, and the user never loses control of the encryption key.

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Building the PiDP8/I

23 Jul 2015
Posted by gerry

The story leading up to this can be read here. In short though, I have always had a thing for retro computers, and DEC boxes in particular, and now I have a remake of a PDP8/I in the form of a kit provided by Oscar Vermeulen another retro computing geek with an excellent site at Obsolescence Guaranteed.

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Posted by gerry

I have always been a fan of DEC minicomputers... 
I grew up in Galway, Ireland... often seen on the front panel of PDPs instead of the more common Maynard, Massechusetts, since DEC had a manufacturing plant there until the late 80s. 

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